Malicious PDF — malware analysis report

Static analysis result for SHA-256 9358ad4b4862f72e…

MALICIOUS

PDF

60.5 KB Created: 2020-12-04 23:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f436e07622b5b7c524ee56922fa09fbb SHA-1: b69d4e70cbb8f403eb880f32055ed5bc0a9ce7c3 SHA-256: 9358ad4b4862f72e322427829d3e43859798a30ccca1d8835a629debf700d565
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link disguised as a product manual, which is a common lure for phishing or malware distribution. The link points to a known malicious redirector, indicating a high likelihood of malicious intent. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/aws?utm_term=tissot+pr+100+powermatic+80+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_5f94c20b36abe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463528/normal_5fa6f357913f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/sheet_metal_fabricators_in_kolkata.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/kasaremilaniwilavuxurapag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e1ef0b2-b3aa-4e1a-9b92-2a63d0edc39c/jiliwamonowutajivarari.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/galilafowogedaw.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/kaxinores.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/unit_of_analysis_definition_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f27f5b-7c45-43d0-8fd6-0ef4dc760eb8/88143419018.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29d2a403f5353fda0c22b/t/5fc7eb8be3db732bc6c7aa64/1606937484161/movie_box_not_loading_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/vidmate_apk_cnet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b26173-0e0e-4381-a6e0-d10c505a65c5/lg_g_flex_weather_widget_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76dd44c3-bb74-4207-9160-f8d72cb5f6aa/cell_structure_answer_key_gizmo.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/forrest_gump_timeline_project.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b26fc3-7976-47d7-a245-aa30892a1a8a/86771546729.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB078 5508 bytes
SHA-256: 7d09e7e5ee8e0949c00ca5c0ff20d6a48fd7cbf39beebfa19ae9bc3b0081e5f4
font_01_sfnt_off0000c330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC330 10328 bytes
SHA-256: fab265a0d9c3fca6e01c452e2457d31606481fc6b7cb190dbce1aca3013776c0